The Caster blossoms with a low roar into an explosion of flame. Each creature in a 20-foot-radius sphere centered on the caster must make a Dexterity saving throw. A target takes 8d6 fire damage on a failed save, or half as much damage on a successful one. Unless they possess an immunity to fire damage or a resistance to fire the caster takes full damage as well.

The fire spreads around corners. It ignites flammable objects in the area that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.